json array sort by value in php

Question

I have JSON arrays of objects. I am trying to sort an array using usort. I want to use value field from field_listing_order. It sorted using value. I am missing something but not able to figure it out. please review the code. Thanks!

and So on ...

  foreach ($view->result as $result) {   
        $node = $result->_data['nid']['entity'];  
        $listing_order = $node->field_listing_order[LANGUAGE_NONE][0];
         .....            
       // code goes here and it works well. sorting issue
}

 usort ($node->field_listing_order[LANGUAGE_NONE][0], function($a, $b){
       return strcmp($a->value, $b->value);
   }); ?>

You want to sort elements inside field_listing_order or "global" objects? — Syscall
– Syscall, Commented May 7, 2018 at 18:52
It's about sorting global object using value not inside. $a and $b used comparing the value. — Nisarg
– Nisarg, Commented May 7, 2018 at 19:00

Nisarg · Accepted Answer · 2018-05-09 12:45:16Z

1

If you need to sort all the nodes using the field_listing_order value, you need to compare the values along the full path, from the first object to the value:

usort($view->result, function($a, $b) {
    $la = $a->_data['nid']['entity']->field_listing_order[LANGUAGE_NONE][0]['value'];
    $lb = $b->_data['nid']['entity']->field_listing_order[LANGUAGE_NONE][0]['value'];
    return $la - $lb ;
});

In this case $a and $b are two different nodes which could be compared. That why you should compare the field_listing_order's value of these nodes. The answer is working with $la- $lb

edited May 9, 2018 at 12:45

Nisarg

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answered May 7, 2018 at 19:04

Syscall

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6 Comments

Syscall Over a year ago

Note: this sort should be done outside the loop, of course.

Nisarg Over a year ago

it's not sorting and not seeing any error code either. What if the array is already sorted. Still we can sort using some other element. Right?

Syscall Over a year ago

Yes, there is no changes if the array is already sorted. You could try $la-$lb to check if the order is reversed. Is it your question?

Nisarg Over a year ago

I am just asking. I will try $la-$lb.

Nisarg Over a year ago

Thank you @Syscall. Finally I have figured it out issue on my end and it's working with $la-$lb

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